2 Dragon monstersbrOnce per opponents turn if this card is in the Extra Monster Zone Quick Effect You can Tribute 1 monster from your hand or field return 1 faceup card on the field to the hand If this card is Tributed Special Summon 1 Dragon monster from your hand or Deck and make its ATKDEF 0 You can only use this effect of Hieratic Seal of the Heavenly Spheres once per turn
